Snap connection for tire-chains.



` A. PURDIE.

SNAP CONNECTION FOR TIRE CHAINS.

lL'ED MAYl 19 Patented July 23, 1918.

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SNAP CONNECTION FOR TIRE CHAINS.

APPLICATION FILED MAI/13.1915.

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pecicatvion of Letters Patent.

application nled May 13, 1915. Serial No. 27,742.

ments in Snap Connections for rfire-Chains5v of which the following is a specification, reference being had therein to the accompanying drawings. y

rlhis invention relates to tire chains orv mud chains for tires for the traction bearing wheels of vehicles and to an arrangement thereof'whereby the chains are readily secured in position, kthe connecting portions accommodating themselves to wheels of different dimensions and automatically adj usting themselves without the necesslty of the use of hand tools in applying or releasing them.

The invention consists inthe matters hereinafter set fo-rth I and more particularly titl fifi

pointed out in the appended claims.

fn the drawings, Y

Figure 1 is a view in section of a tire and rim equipped with a mud chain that embodies features of the invention;

Fig. 2 is a similar view showing a slight modification in-the holding means;

Fig. 3 is a view in detail of a spoke clamp; Fig. t is a view in detail of a link plate; Fig. fisva View in detail of a'spoke clamp and link;

Fig. 6 is a view in detail showing the application of the clamp link;

Fig. 7 is a view in detail showing a modification of the chain; r

Fig. 8 is a view in detail showing the application of the link and snap hook to a spoke clamp; 1 y -1 Figs. 9. and 11 are views in detail of the chain shown in Fig. 7, and

Fig. 12, is ay view showing a modiiication of the clamp. 1

Referring to the drawings9 a'series of seetions 1 each in the form of a rectangular link having a hooked tongue at one 'end adapted to engage over the corresponding side 2 of the adjacent link are connected to form a chain of sui'cient length to extend' across the face of a tire 3 as indicated. Fach link has a diagonally arranged, sinuous projection 4C with concave faces blending smoothly into the body of the link. The

links are made right and left handed to reverse the direction'of these projectionsA and are arranged to detachably hook together in the manner of a sprocket chain. A

` A suitable link 5 couples one end of the sections with a clamp link 6. 'llhe latter passes through an opening in the lugs 7 of a pair of oppositely disposed spoke clamp rateatea aan aa, rare.

sectionsl 8 that are curved'to conform and grip closelyabout a spoke 9. Preferably the lugs have grooves 10' into which the slightly divergent arms 26 (Fig. 5) of the `link 6 are crowded7 the 'upper edges of the lugs being wider than the lower margins so that the lugs are vertically wedge shaped,

there being two or more sets of grooves 10,'

so that the member 6 may be more or less inclined to accommodate itself to different :widths of fellies or tires.v its herein indicated, it is snapped or crowded into the inner set of grooves while the other set is' shown unoccupied. A hook 11 on one of the clamp sections 8 and a corresponding hook on the other section., both diametrically oposite the lugs 7 are arranged to receive a vink 13 that is connected by a spring 1a and spudded link 15 Awith the other endl of the tread section. ik guard link 16 prevents undue distention of the spring. rll`he hook 11 and companion lug 34k are' provided with sets of divergent ooves 17 so that the ring 13 may be crow ed into any one pair of grooves and thereby yieldingly lock in the oblique position assumed, dependent upon the width of the. tire,the link of course crowding the hooks together in a similar manner to the link 6..' p

ln Figs. 2, 7 and 8 a slight modication is shown in the fastening means by the introduction of a swiveled snap hook 18 having a straight finger 19' So that the member 20 into which it is inserted is under lthe same tension at the point of entrance of the finger as it is whenl the hnger is pushed through far enough to allow a tapered spring plunger or latch 21 with finger pull 22 to crowd past it. fn thisl instance also one of the otherwise similar hooks 11 may be replaced by a lug 12 with opening therethrough. llhe member 20 may take the form instance each has entension 27 on.

l its tongue that extends well into the opening of the companion link engaged by the tongue so that the open spaces or notches between the links are minimized. Atthe same time the body of the link is extended to form a `vrule joint that maintains a flush surface lrivet 31 to hold a lining 32 of soft fabric,

leather or the like, without projecting suficiently to mar an inclosedspoke.

As a result of this construction an antiskidding device is obtained that may be quickly adjusted to any size tire and any form of rim or spoke without special tools,

-as theclamp maintains its position when under strain because of the wedging of the clamp locks into the holding links of the chain.

Obviously, changes in the details of construction may bemade without departing from the spirit of my invention and I`- do not care to limit myself to any particular form or arrangement of parts.

What l claim ier- -1. An anti-skidding device for tires comprising a chain tread section adapted to embrace and conform to a tire tread, a pair of clamp sections adapted to grip the spokes between them and provided with oppositely disposed lugs, links engaging each pair of lugs and adapted to draw the clamp sections together when under strain, and means for detachably connecting one of the links with the adjacent end of the sections.

2. An anti-skidding device for tires comprising a chain tread section adapted to conform to a tire tread when disposed transversely thereon, a fixed link attached to one end portion, a pair of clamp sections adapt ed to grip a spoke between them and provided with oppositely disposed pairs of lugs, one pair of which is engaged by the lixed link, a link adapted to hook over the opposite pair of lugs and to force them and the clamp sections toward each other when nnderstrain, and means detachably connecting the link with the other end of the tread section.

ln testimony whereof I aiiix my signature in presence of two witnesses.

ALEXANDER PURDIE. Witnesses:

C. R. STICKNEY, ANNA M. Donn. 

